Electric door-lock



UNITED STATES GUSTAV IDEEG', OF NEWARK, NEW EBSEY.

ELECTRIC nooR-fioox.

Specification of Letters Patent. Patented May 3, 1921.

Application filed February 27, 1920. Serial No. 361,797.

To all whom it may concern:

Be it known that I, GUsrAv Dune, a citizen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented a new and Improved Electric Door-Lock, of which the following is a full, clear, andexact description.

This invention relates to door locks, and has reference more particularly to a door lock having mechanism operated by electricity so that the door may be locked from a distant point. Y

An object of this invention is to provide a door lock of the class indicated, which is adapted-to prevent the exit of a thief from a bank, store, or other building by pressin an electric button at a distance from said door.

Another object of this invention isto provide a door lock which may be placed on the doors of private oflice s so that the door may be locked when desired by pressing anelec tric button located conveniently on the desk of the ofiice.

Reference is to be had to the accompanying drawing forming a part of this specification in which it is understood that the drawing illustrates only one form of the invention, and in which 1 Figure 1 is an elevation of an electric door lock with one of the cover plates removed to disclose the inner mechanism.

Fig. 2 is a view similar to Fig. 1 with the mechanism in an unlocked position.

Fig. 3 is a section on the line 3-3 of Fig. 1. j

Fig; 4 is a section on the line 4-4 of Fi 1. -eferring to the accompanying drawing by numerals, 10 indicates one wall of-a fiat box which is provided with three sides '11, anda fourth side 12 secured to the sides 11 and the wall 10, and extending somewhat beyond the-sides 11 on each side of the box. A second wall 13 is secured to the box by means of screws not shown in the screw holes 14. An ordinary tumbler lock 15 is screwed into the wall Y10 and is prevented from being unscrewed when the door is closed by means of a finger 16 which is provided on one end with a lug 17 adapted to engage a recess 18 formed in the lock 15. The end of the finger 16 opposite the In 17 is screwed on to athreaded pin 19: whic is slidably and rotatably mounted in a pair of guides 20. 'The end of the pin 19 opposite the'finger 16is provided with a head 21 1n whlch is formed a screw driver slot 22 so that the pin 19 may be rotated and the posltion of the finger 16 relative to the recess 18 varied at will, thus allowing the lock 15 to be unscrewed and adjustment made on its interior mechanism.

gage. a plate, not shown, on the jamb of the door and thus hold the-door in a locked position. A lever 26is fulcrumed on a pin 7 27, said 'pin being secured'in the wall 10 of the box. One end of the lever 26 is positioned between a pair of pins 28 secured to the spindle 23'at rightangles thereto. The other end of the lever 26'engages-a lever 29 which is mounted on a square shaft 30 which extends laterally through the walls 10 and 13 of the box'and is secured on the outside of-said box to the door knob not shown. When the door 'knob is rotated either in clock-wise or counter clock-wise 1 direction, the lever 29 will engage the lever 26 so as to move said lever 26 about the pin 27 to a position as shown'in Fig.-2. When in this position, the lever 26 will have engaged the pins 28 so as to move the spindle '23 axially and thus withdraw the block 241 so'that the door is free to swing-open. A

pin'31 similar to thepins'28 is secured at right angles to the spindle 23 and is adapted to limit the movement of the spindle 23 by engaging one of the guides 20. In order to resi'liently'hold the lever 26 so that the block 24pwill extend through the side 12 and engage the plate on the jamb of the door, a I

spring 32' is secured to the lever 26 and to a pin 33, secured in the wall 10;

" 'It is desired to provide a mechanism which will beoperated byv electricity and "will prevent the axial movement of the block 24; into the interior of the box when an at- 'temptfis made to turn the knob of the door,

and for this purpose a groove 34: is formed on the inner side of the block 24. An arm 35 is pivotally mounted at oneend-onthe pin 27 and is provided on the other end with f a lug 36 which is adapted to engage the groove 34 and prevent the axial movement of the block 24. A lever 36 is secured to the arm 35 between the pin 27 and the lug 36, and extends obliquely to said arm 35 so that when the lever 36v is moved about the pin 27, the lug 36 will be disengaged from the groove 34 so as to allow the axial movement of the block 24 to' the position shown in Fig. 2,- The 111g 36 is normally held in engagement with the groove 34 by means of a spring 37 secured to the lever 36 and to one side 11 of the box.

A barrel 38 is mounted in the lock 15 and is adapted to be rotated in said look by means of a key on the outside of the door. A

V finger 39 is fixed to the inside end of the barrel 38 by means of screws 40 and when said finger 39 is rotated by means of a key to the position shown in dotted lines in Fig. 1, it engages the'end of the lever 36 and rotates ,it slightly, so that the lug 36 is moved out of engagement with the groove 34 thus allowing the block 24 to be moved axially byrotating the door knob, and thus allowing the opening of thedoor. A lug 41 extends laterally from the lever 36 and is adapted to engage a shoulder 42 formed on 7 an arm 43 which in turn is pivoted on a pin 44 secured to the wall 10 ofthe box. This shoulder 42 is adapted to normally hook over the lug 41' and hold the lever 36 in a position as shown in dotted lines in Fig. 1, so that the door will normally be unlocked and can be opened by rotating the knob thereof. The arm 43 is resiliently pressed against'the lug41by a fiat spring 45 secured to said arm 43 by means of a rivet 46, said spring pressing against the side 11 of the box. In order to electrically move the arm 43 about the pin 44 so as to disengage v the shoulder 42 from the lug 41 and allow the lug 36 toengage the groove 34 under the action of the spring 37, a solenoid 47 is se cured to the wall 10 .by means of a bolt 48 so as to be positionedsubstantially at right angles to the arm 43. This solenoid '47 is provided with a soft iron core 49 which will be .51 and a switch 52 which may take the form of an electric push buttonwhich can be located at any distant point. The door can also be locked bymeans of the key rotating the finger 39 until said finger engages an arm 53 secured to the arm 43 substantially at right angles thereto, so that the shoulder "the door of a bank, store, a private office or the like, and the switch 52 is located at ome distant point from the door where it can be conveniently operated by a bank teller, a clerk, or a business man. In some establishment. which handles valuables such as a bank or jewelry store, if a thief seizes some o'fthe valuables and starts for the door for the purpose of making his exit, the clerk or bank teller can press the button and the door will be electrically locked so that the exit of the thief is prevented, and his capture made easier. when the electric button 52 is pressed, the lever 36 which has normally been positioned as shown'in dotted lines in Fig. l, is released since the arm 43 is attracted by the soft iron core 49 of the solenoid 47 so that the shoulder 42 is disengaged from the lug 41 thus allowing the lever 36' tomove about the pin 27 under the action of the spring 37 until the lug 36 engages the groove 34, thus preventing the axial movement of the block 24 by turning the door knob.-v Thus the exit of the thief is effectually stopped and his subsequent capture is made easier while he is likewise prevented from escaping with a quantity of valuable goods. WVhen it is desired to unlock the door after the button 52 hasbeen pressed, a key is inserted in the barrel 38 and said barrel'is rotated until the finger 39 engages the leverv 36, thus causing the 95 shoulder 42 to engage the lug 41 and allowing the lever" 26 to be moved about the pin 27 by means of the lever 29 on the knob shaft 30. When this lever 26 is moved about the pin 27 the block 24 will be moved 100 inwardly so that the mechanism will be posi- .tioned as shown in Fig. 2, and the door will be free to open; If. it is desired to lock the door by means-of the key, the rotation of I the barrel 38 is continued so that the-1 finger 39 engages'the arm 53 thus causing the arm 43 to move about the pin 44 so that the shoulder. 42 is disengaged from the lug 41,

and the lug 36"then engages the groove 34 and prevents the opening of the door.

I would state in conclusion that while the illustrated example constitutes a practical embodiment of my invention, I do not limit -myself strictly. to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims. 7 7

Having thus described my inventionyI' Patent: a

' 1. Ina door lock,-a sliding element assoclaim as new and desire to secure by Letters 'ciated'with said-door, a fixed member,-said Slldlllg element being adapted to move axially so as to engage said fixed member and lockthe door thereto, a door knob, means associated with said door knob for moving said slidable element axially so as to be disengaged from said fixed member,

means releasedby electricity from a distant .130

point for preventing said. sliding element from being disengaged from said fixed element by the door knob, and a lock cooperating with the electrical releasingmeans to actuate said means and move it from engagement with the sliding element whereby the sliding element may bedisengaged from the fixe% element by the movement of the door kno 2. In a door lock, a sliding element associated with said door, said sliding element being adapted to move axially so as to engage a fixed member, thus locking said door to said fixed member, a door knob, means associated with said door knob for moving said sliding element axially so as to be dis engaged from said fixed member, means released by electricity from a distant point for preventing said sliding element from beingdisengaged from said fixed element by said door knob, and means operated by a key for allowing the sliding element to be moved axially by said door knob.

3. In adoor look, a sliding element associated with said door, said sliding element being adapted to move axially so as to engage .a fixed member, thus locking said door to said fixed member, a door knob, means associated with said door knob for movlng" said sliding element axially so as to be dis-- axially by saiddoor knob, and means oper- I ated by said key for preventing'the axial movement of the sliding element by means of the door. knob. v v

GUSTAV DEEG. 

